TNDM icon

Tandem Diabetes Care
TNDM

Overview Fund Activity

272 hedge funds and large institutions have $1.4B invested in Tandem Diabetes Care in 2025 Q1 according to their latest regulatory filings, with 39 funds opening new positions, 106 increasing their positions, 85 reducing their positions, and 78 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
272
Holders Change
-42
Holders Change %
-13.38%
% of All Funds
3.69%
Holding in Top 10
2
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-60%
% of All Funds
0.03%
New
39
Increased
106
Reduced
85
Closed
78
Calls
$61.6M
Puts
$5.47M
Net Calls
+$56.1M
Net Calls Change
-$50.2M

Top Buyers

1
SC
Sessa Capital
New York
+$85.6M
2
HRCM
Hood River Capital Management
Florida
+$19.8M
3
Balyasny Asset Management
Balyasny Asset Management
Illinois
+$14.7M
4
GKIM
GW&K Investment Management
Massachusetts
+$14.2M
5
PIM
Paradice Investment Management
Colorado
+$13.3M

Top Sellers

1
GGHC
Gilder Gagnon Howe & Co
New York
-$33.6M
2
BG
Bellevue Group
Switzerland
-$28.2M
3
Capital International Investors
Capital International Investors
California
-$25.9M
4
OAM
Oberweis Asset Management
Illinois
-$18.2M
5
CC
Chicago Capital
Illinois
-$18.2M
Name Holding Trade Value Shares
Change 		Shares
Change %
TRCT
201
Tower Research Capital (TRC)
New York
$55.1K -$19.6K -1,024 -26%
Lazard Asset Management
202
Lazard Asset Management
New York
$50K +$50K +2,651 New
SFFS
203
Stonehage Fleming Financial Services
Jersey
$48.9K – – –
CFD
204
Creative Financial Designs
Indiana
$48.3K – – –
GI
205
GAMMA Investing
California
$42.2K -$51.4K -2,685 -55%
NS
206
NBC Securities
Alabama
$37K +$37K +1,945 New
AssetMark Inc
207
AssetMark Inc
California
$33.5K +$10.1K +525 +43%
AF
208
Advisornet Financial
Minnesota
$32.9K +$3.45K +180 +12%
S
209
SignatureFD
Georgia
$32.5K -$10.9K -567 -25%
Simplex Trading
210
Simplex Trading
Illinois
$28K +$28K +1,503 New
Nisa Investment Advisors
211
Nisa Investment Advisors
Missouri
$27.9K +$3.12K +163 +13%
CA
212
CoreCap Advisors
Michigan
$24.6K – – –
ME
213
McIlrath & Eck
Washington
$23.3K – – –
FHA
214
First Horizon Advisors
Tennessee
$20.5K +$1.84K +96 +10%
PA
215
Parallel Advisors
California
$19.5K -$3.28K -171 -14%
SAM
216
Smartleaf Asset Management
Massachusetts
$19.4K -$14.8K -767 -43%
SIC
217
Salem Investment Counselors
North Carolina
$19.2K – – –
Jones Financial Companies
218
Jones Financial Companies
Missouri
$16.4K -$5.34K -277 -25%
Carson Wealth (CWM LLC)
219
Carson Wealth (CWM LLC)
Nebraska
$15K -$3.17K -163 -17%
VCM
220
Versant Capital Management
Arizona
$14.8K +$3.6K +188 +32%
CIBC Private Wealth Group
221
CIBC Private Wealth Group
Georgia
$10.6K +$7.6K +464 +255%
NA
222
NewEdge Advisors
Louisiana
$8.66K +$5.63K +294 +186%
Fifth Third Bancorp
223
Fifth Third Bancorp
Ohio
$8.26K +$77 +4 +0.9%
AAP
224
Arax Advisory Partners
Colorado
$7.99K +$7.66K +400 +2,353%
PS
225
Principal Securities
Iowa
$7.96K – – –
7 8
9
10 11